Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1982-03-12

1984-03-27

Robinson, Ellis P.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

252 6254, 360134, 360135, 360136, 427128, 428336, 4284259, 428694, 428695, 428464, 428900, G11B 570

Patent

active

044394861

ABSTRACT:
A magnetic recording medium having a magnetic layer formed on a nonmagnetic base is disclosed. The magnetic layer comprises ferromagnetic particles having a specific surface area of 30 m.sup.2 /g or more. The particles are dispersed in a binder which comprises a thermoplastic polyurethane resin or polyurethane prepolymer and nitrocellulose having an average degree of polymerization of about 50 to 300 and a degree of nitration of 10.7 to 13.0.

REFERENCES:
patent: 4002804 (1977-01-01), Akashi
patent: 4323596 (1982-04-01), Buxbaum et al.
patent: 4363850 (1982-12-01), Yasui
Encycloped. of Polymer Sci. & Tech., vol. 3, "Cellulose Nitrate", pp. 307-310, John Wiley & Sons, Inc., 1965.

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